Drawing roll



April 23-, 1940 `J. wx-:INBRGER 2,198,279

\ DRAWING ROLL Filed July 3o, 1938 iiatented Apr, 23, 1940 UNITED STATES PATENT h OFFICE Y h i nnAWINGnoLL; Jan Weinberger, Lowell, Mass. Application July so, 133s, serial No. 222,232 d 2 claims. (ci. 1st- 139i `This invention relates to a drawing roll and has` relation more particularly to a top drawing roll,

and it is primarily an object of the invention to provide a top roll so `constructed and `assembled to act upon the sliver passing therebelow to effectively control the shortflbres that may be` in the sliver which are not controlled by the entry or delivery rolls and thereby substantially eliminatingthe liability of bunches forming in the sliver.

It is also an object of ,the` invention to `provide a` top drawing rollincluding `a part for direct contactwith asliver, said part `being so constructed and arranged as to have three different movements, namely, rotatable, axial and radial.

The invention consists'in the details of construction and in the `combination and` arrangement of the several parts of my improved drawing roll wherebycertain important advantages are attained and the device rendered simpler, less expensive and otherwise more `convenient and advantageous for usegas willbehereinafter more fully set" forth. i i i The novel `features of my inventionwill herein-` after be definitely claimed. i

Inmorder that `my invention may be the better understood, I will now proceed to describethe same with reference to the` accompanyingl drawing`,vvherein:` h V I I Figure 1 is a diagrammatic view in section illustrating the roll arrangement as `herein embodied;

Figure 2 is a view partlyin `sectionand partly in elevation illustrating a pair of Coacting draft rolls constructed in accordance with an embodiment of my` invention; 1 l

Figure 3 is a longitudinal `sectional view with parts in elevation taken through the upper roll structure, the roll having been revolved through 180 from that shown in Fig. 2.

Figurefi is a fragmentary end elevational `view illustrating the general type of bearing employed in connection with the roll assembly `as herein disclosed. l i

My improved roll as"herein disclosed is to be substituted for a top roll of a conventional drawing machineyroving frame or kindred structures used inthe textileindustry.

y In` the present embodiment of myinvention I disclose a, drawing machine of a type including the bottom rolls i, 2, 3 and I, the roll I constitut- 50 ing the delivery roll, the roll 2 constituting the entry roll, and therolls 3 and 4 constituting inter-` each of the draft rolls 3 and (is aitopdraft roll constructed in i accordance with my invention. While I disclose one of `my improved top rolls used in connection with `leach" of" the intermediate or draft rolls, it is to be understood that ofttimes it is only necessary thatone of my improved rolls be used. As isnow well known, the rolls I', 2, 3 and successively have increased peripheral speed. However, as this formsno part of my present invention a detailed description vand illustration is believed to be unnecessary. The rolls 5 and E are weighted in a conventional manner.

Myimproved roll asherein disclosed comprises an elongated arbor orshaft 1, the extremities of whichare rotatably received within the bearing blocks 8. Each of these bearing blocks 8, as herein disclosed, is freely mounted in a vertically` disposed slot 9 whereby the bearing block is free for up, and down` movement. These bearing blocks 8 have flattened faces IIJ for direct contact with the side wallsof the slots 8 so that the bearing blocks 8 will be held against rotation.

fThe arboror shaft l` has its central portion I I of increased diameter whereby are provided longitudinally spaced surroundingshoulders I2 with which contactl the internal shoulders` I4 of the collars I5 which freely "surround the arbor or shaft 1 and the adjacent end extremities of the enlarged portion II. The outer ends of these collars I5 are square while the inner ends ISare disposedv on a predetermined bevel, preferably six degrees although, of course, I do not wish to be understood as limiting myself to this exact degree.` Interposed between the collars I5 are the tubular members orsections I8 of required lengths and of any desired number. These members or sections I8 are tubular and the interior diameter of each of these tubes or sections I8 is materially greater than the diameter of the portion II of the arbor or`shaft 1. The ends I8 of these merri-y bers or sections I8 are also disposed on a predetermined angle, preferably six degrees, whereby the endsof the sections or members I8 may be termed as cam ends for coaction with each other and with the ends I6 of the collars I5 to cause the members or sections I8 to have back and forth axial movement during the rotation of a member or section I8 to fluff the sliver as it passes between such section or member I8 and the coacting bottom draft roll 3 or 4L Theextremities of the arbor or `shaft 1, as hereinbei'ore stated, are

d rotatably received within the bearing blocks s 1n I8 andthearbor or shaft 1 will result inrotation of said arbor or shaft.

The collars I5 are of a diameter in excess of the diameters of the members or sections I8 and such relative diameters are such that at no time does any portion of a' member or section Il extend beyond the periphery of the collar l5.

The collars i5V on the shaft or arbor 1 have frictional contact from above with the collars 2l fixed to the end portions of a draft roll 3 or 4 whereby'the shaft Vor arbor 1 is normally spaced a predetermined distance from the associated roll 3 or 4 with 'the shaft or arbor 1 in parallelism with such roll 3 or 4. l

The speed of a sliver as drawn increases as it passes over the bottom rolls of increasing speed whereby the desired stretching of the vbreir is obtained which is in accordance with the well' known practice. A sliver, as is well known, comprises fibres of varying lengths and with the/,use of a roll or rolls constructed in accordance with. an embodiment of .my invention the short nbres.` which'would otherwise float without control between the entry y'sind delivery rolls, are prevented from bunching, as the laction of my improved roll or rolls results in a iluffing of the sliver and thus avoids the short bres having adhesionvto `the longerfibres.

By having the separate members or sections IB, it is believed to be clearly apparent that each of said sectionsor members Il is free to rotate independently of the other as the sliver is drawn ltherebeneathanrl' as the interior diameter of each of the members or sections Il is greater than the diameter of the adjacent portion of the shaft or arbor 1, said member or section I8 will also have free movement in substan-l tially a radial direction or upwardly in order to compensate for varying thicknesses ofthe sliver or an'increased thickness which may be caused by abunching. AI'his radial and rotary movement of a member or section I8 is insumcient to properly .iluil' the sliver, or more particularly a .bunch in the sliver, but `effective iluffing is assured by the reciprocal axial movement of the member` or section I8 which readily occurs irrespectiveof the rotary or radial movement hereinbefore referred to. f

As is .well known, as a sliver travels through the drawing rollsr it yhas a tendency to have side movement or, in other words. does not at all times mov'e forwardly in' avilxed path of travel. If the ends of the sections or members i8 were square the side movement of the sliver on one section or member. i8 wouldr at times strike the end of an adjacent member `or section Il withV undesirable results. However, by having the ends members .or sections i8 in an `axial direction.

This reciprocalendwise movementof the members or sections i8 is assured due to the difference of speed between the collars I5 andthe sections or membersy I8. The collars I5 travel at a xed speed as determined by thespeed of the collars 20`on a bottom roll l or 4. The diameters of the collars 20 on the bottom roll I or 4 are less than the diameter of the central working portion of the bottom roll 3 or 4 whereby the peripheral speed of such collars 2 0 is less than the peripheral speed of the working portion of the roll 3 or 4.

Each of the slivers passingy under a `member or section I l travels at a speed higher than the peripheral speed of its associated bottom roll 8 or 4, such speed of the sliver being innuenced by the delivery rolls. v

As before stated, the peripheral speed of the roll I or 4 is greater than the collars 2l thereon. 'I'his is of importance because it is a result of this difference in speed that the reciprocal axial movement of the members or sections i8 is effected. Itis also believed to be obvious, in view of the foregoing, that each of the members or sections i8 is capable of a peripheral speed `greater than that of the others. This dierence in peripheral speeds is of advantage as under certain conditions a memberor section I8 may have contact with both the roll l 'or 4 and a sliver and under "which conditions the rotation lof the'member or section would be 'approximately lone-half thedifference in relative speeds ofthe working periphery lof the roll. 3 or 4 andthe sliver. VIt is believed, therefore. to be obvious rthat in the effective action `of the members or sections I8 three separate s'peedsare involvedand these speeds are diagrammatically indicated as d, b and c in Figure 2 of thedrawlng. The peripheral speed a of thev collarsl II is less than the peripheral speed b of ythe working portion of a roll 3 or 4 while the speed cof the sliver s is greater. These variations-in speed together withl the beveledf ends of the sections ormember's l' and the beveled ends of the collars I5 assurethe desired reciprocating axial movement of the members or sections Il.

In connection with my improvedfroil no cleaner is required to prevent the libre from wrapping therearoundas such wrapping is entirely avoided by the axial reciprocation 'ofgthe members orvsections I8 as hereinfore mentioned.

From the foregoing description it is thought to be obvious that a drawing roll constructed in accordance with myinvention is particularly well adapted for use by reason of the convenience and facility with which it maybe assembledand operated, and it will also be obvious that my invention is susceptible of vsome change and modification without'v departing from the principles and spirit thereof and for this reason I do not wish to be understood as limiting myself to the precise arrangementand formationk of the several parts hereinl shown yin carrying out my inventionvin practicev except as hereinafter claimed.

, 1;In av Vdrawing,apparatus of the class described, a bottom roll, a shaft supported above the bottom roll, collars on the shaft, means for rotating said collars at a peripheral speed slower than the peripheral speed of the working portion ofthe ybottoni roll, the opposed faces of the collars being beveled. separate tubular- 'members surrounding `the shaft and disposed along the space between' the collars, the ends of said tubular members being beveled, adjacent extremities of the members contacting with each other and the outer extremities of the end tubular members having contact with the beveled faces of the collars on the shaft, the interior diameters of the tubular members being greater than the diameter ofthe 'associated portion of the shaft, and meansfor drawing a sliver between the lower roll and one of the tubular members at a speed higher than the peripheral speed of the working portion of the lower roll.

2. In a drawing apparatus of the class `described, a bottom roll, a shaft rotatably supported above the bottom roll, collars rotatably mounted on the shaft and having` driven engagement with the bottom roll, the opposed faces of the collars being beveled, separate tubular members surrounding the shaft and disposed along the space between the collars, the ends of said tubular members being beveled, adjacent extremities of the members contacting with each other and the outer extremities of the end tubular members having contact with the beveled.

faces of the collars onthe shaft, the interior diameters of the tubular members being greater than the diameter of the associated portion of the shaft, and means for drawing a sliver between the bottom roll and one ol the tubular members. Y

` JAN WEINBERGER. 

